Improvement in machines for cold-rolling sheet metal



J. EVANS.

Machines for Cold Rolling Sheet-Metals. N0.135,102. PatentedJan-21,1873.

FIG.I.

Attest.

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AM. PHOTO-LITHDGRAPH/C ca lin'osaomvsk PROGE-SQ) UN ED STAT S PATENTOFFICE.

JAMES EVANS, OF PORTSMOUTH, OHIO.

; Specification forming part of Letters Patent No. 135,102, datedJanuary 21, 1873.

To all whom it may concern:

Be it known that I, JAMES EVANS, of Portsmouth, Scioto county, Ohio,have invented a new and useful Machine for the Cold-Rolling of SheetMetal, of which the following is a specification Nature and Objects ofthe Invention.

This is a machine for smoothing and leveling sheet-iron, such asstove-pipe iron and other sheet metal, and in its most complete formpossesses several important advantages, such as, first, the completelyuniform smoothing and leveling of metallic sheets with an equalpressure, wholly irrespective of thickness; second, the cheap and easyrestoration of worn rolls by simply shifting them, and without removalfrom the machine or interruption of its use.

Description with Reference to the Drawing.

Figure 1 is a side elevation of a cold-rolling machine embodying myimprovement, the upper portion of one of the standards beingbroken away.Fig. 2 is an end elevation of the machine with the levers and weightsremoved. Fig. 3 is a perspective view of one end of my rider with itsappendages, the levers being broken oil; and Fig. 4 is a plan of the topof one of the standards, showing the cheeks and one of the saddles.

My machine comprises essentially a series of rolls, A A A A A. A A, ofcylindrical form and equal diameters. These rolls rest horizontally oneupon another, so as to constitute a vertical range or tier, asrepresented. The journals B of these rolls occupy vertical slots 0 incheeks G, of brass or other suitable metal, and these cheeks occupyvertical slots in the standards D of my housing, and are secured inplace by means of tongues d and grooves e. The lowest roller journals inthe half-round bottoms of the slots 0, and upon the periphery of thisrollreststhe next in succession, and so on to the top one, the journalsof each roll being-held against both lateral andlongitudinaljdisplacement by the sides of the slots 0, beyond which theyslightly project, for a purpose that will presently appear. The journalsof one roll, preferably the lowest one, are prolonged for the attachmentof bandpulleys E, by which said roll is driven, and

from this motion is communicated to all the others by the simplefriction of their peripheries as they rotate in contact. The housingsare firmly bolted to a carefully-leveled and substantial base, F, andare held at their proper distance apart by means of stays G, one or moreof which may have sleeves H to serve as rests in feeding sheets into themachine.

Upon each journal of the top roll rests a saddle, I, whose lip toccupies a nick, j, on the under side of rider J, which rests upon saidsaddles, extending from one to the other and beyond them to receiveyokes L. Hooked lugs M, whichproject outwardly from the housings, serveas fulcrums for the engagement of the hooked extremities n of levers N,which are nicked, n, on their under sides, so as to rest securely uponthe wrists l of yokes L. Eyes n in the free extremities of the levers Nreceive the hooked carriers 0, which are loaded with weights P to anyextent required. Additional hooked lugs, M, saddles I, and levers L maybe employed, if desired, so as to divide with the upper roll andweighted attachments the duty of imparting the requisite pressure.

Operation.

The levers n having been properly weight ed, the machine is set inmotion, and a sheet or bundle of sheets, having been fed in on one side,is returned through the next pair of rolls above or below, as may bepreferred, and these passes are repeated as often as necessary. Thepowerful leverage of the loaded parts acts to closely nip and level thesheets without a positive or gage distance, so that, while the desireduniform pressure is obtained, there is no liability incurred of cuttingthe sheets or of breaking the machine as when the common unyieldingadjusting-screws are employed.

In case one pair of rollers should become worn in the middle, (as mustsooner or later occur with any rolls,) it is but the work of a fewminutes to shift the worn rollers to a hi gh or or lower position in thetier, so as to bring unworn ones into their places. The worn rolls willthen, as the machine is used, proceed to wear themselves true again, andmay be restored to their original places by the time the others in turnbecome worn.

While preferring seven to any greater or less'number of rolls, I reservethe right to use any convenient number more than two, preferring,however, an odd number, as, forexample, five, seven, nine.

My extremely simple and easily-managed mechanism of adjustment enablesthe employment of a much cheaper class of labor than that required towork the common screw-machine.

Claims.

I claim as new and of my invention- 1. The arrangement, substantially asdescribed, of a tier of five or more interchangeable rolls resting uponone another, and all propelled from one of them by simple friction.

